Slot ported box design for 3 SSA Dcon 12's

Thinking bout going with 3 Dcon 12's in a slot ported box for my Jeep Liberty. The amp will be a sq 1200 ( 1200x1 @ 1 ohms )
If somebody could give me a box design with all 3 subs firing back with 1 slot port along the bottom under the subs also firing back sharing 1 chamber with a tuning frequency of 33hz. I believe each dcon needs about 2.25^3 is optimal